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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $437,284,762 | 12,360,240 | 12,360,240 |
| 2006 | $401,916,576 | 8,660,360 | 8,660,360 |
| 2007 | $732,741,017 | 10,231,770 | 10,231,770 |
| 2008 | $619,664,648 | 9,663,350 | 9,663,350 |
| 2009 | $532,369,215 | 5,542,360 | 5,542,360 |
Note: Quantity represents Weight in kilograms
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